US3246088A - Opposite rotational sense actuator mechanism for tap changer contacts - Google Patents

Opposite rotational sense actuator mechanism for tap changer contacts Download PDF

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Publication number
US3246088A
US3246088A US316077A US31607763A US3246088A US 3246088 A US3246088 A US 3246088A US 316077 A US316077 A US 316077A US 31607763 A US31607763 A US 31607763A US 3246088 A US3246088 A US 3246088A
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United States
Prior art keywords
contacts
fixed contacts
fixed
movable
arcuate
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Expired - Lifetime
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US316077A
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English (en)
Inventor
Maunder Jeffrey Allen
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Associated Electrical Industries Ltd
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Associated Electrical Industries Ltd
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Publication date
Application filed by Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
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Publication of US3246088A publication Critical patent/US3246088A/en
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/0005—Tap change devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18528—Rotary to intermittent unidirectional motion
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19023—Plural power paths to and/or from gearing
    • Y10T74/19074—Single drive plural driven
    • Y10T74/19121—Concentric

Definitions

  • a known arrangement for transformer on-load tap changing employs two selector switches each comprising a plurality of fixed contacts, usually arranged on a circle and a movable contact operable to engage the fixed contacts in sequence.
  • One of these two selector switches has its fixed contacts connected to odd-numbered tapping points on the transformer and the other has its fixed contacts connected to even-numbered tapping points, a high speed diverter switch being provided to direct the load current through one or the other of the selector switches depending on whether an odd-numbered or an evennumbered tapping point is in use.
  • the two selector switches are arranged to be operated, alternately, to move the movable contact from one fixed contact to the next in the sequence, so that the tapping point in use can be progressively changed, with minimum disturbance of the load circuit, by operating the selector switch not in use and then operating the diverter switch to connect this selector switch to the load and disconnect the other selector switch.
  • the two selector switches With the fixed contacts of the selector switches arranged on circles, the two selector switches are usually mounted, one above the other, on two concentric shafts, respectively coupled to the movable contacts of the two selector switches, the two shafts being arranged to be rotated alternately to operate the movable contacts each through one step at a time.
  • a selector switch suitable for on-load transformer tap changing comprises a plurality of fixed contacts arranged in two arcuate sets, preferably on a common circle, and two contra-rotatable movable contacts operable to selectively engage the fixed contacts of the respective sets, the two movable contacts being arranged to be stepped alternately, each from one fixed contact to the next, between limit positions in one of which they respectively engage the fixed contacts at adjacent ends of the respective arcs and in the other of which they respectively engage the fixed contacts at the other end of these arcs.
  • FIG. 1 represents in plan view a selector switch in accordance with the invention
  • FIG. 2 is a section taken along the line AA in FIG. 1;
  • FIG. 3 is a transformer on-load tap changing arrange ment which includes a selector switch in accordance with the invention.
  • FIG. 4 is a similar section to FIG. 2 but shows in addition a driving mechanism for the switch.
  • an insulating plate 20 carries a plurality of fixed contacts '1, 2, 3, 4 11 arranged on a circle surrounding two arcuate collector bars 21 and 22 which are also carried by the plate 20.
  • the fixed contacts designated by the odd numerals 1, 3, 5 etc. form an arcuate, substantially semicircular, set associated with collector bar 21 and selectively connectible thereto by movable contact 23 carried by an arm 24 radially disposed with respect to the fixed contact circle.
  • Another radial arm 25 carries a movable contact 26 arranged to selectively connect to the collector bar 22 the arcuate, substantially semi-circular, set of fixed contacts formed by those designated by the even numerals 2, 4, 6 etc.
  • the plate 20 may conveniently be moulded from a suitable synthetic resin which can withstand high voltages and may have the fixed contacts 1, 2 11 and the collector bars 21 and 22 moulded therein.
  • the arms 24 and 25 are contra-rotatable by concentric shafts 27 and 28 which are coupled to a suitable driving mechanism (such for instance as that shown in FIG. 4) arranged to step the arms 24 and 25 alternately and in opposite directions round the circle to engage the fixed contacts of their associated sets in sequence.
  • the shaft 28 can be rotated to step the arm 25 to a position in which its contact 26 engages fixed contact 6, then shaft 27 can be rotated to step the arm 24 to a position in which its contact 23 engages fixed contact 7, and so on.
  • the two shafts 27 and 28 can be rotated alternately in this manner until the arms 24 and 25 have been stepped to the limit position in which their contacts 23 and 26 engage fixed contacts 11 and 10 respectively. Alternate rotation of the two shafts 27 and 28 in the reverse direction can be effected until the arms 24 and 25 reach the limit positions in which their contacts engage the fixed contacts 1 and 2.
  • a shaft 30- is rotatably mounted on one end of shaft 27 of the switch and intermittently transmits rotary motion to it through a 2:1 reduction gear train 31, 32, and a Geneva mechanism comprising a star wheel sector 33 and a cam 34.
  • the shaft 30 also intermittently transmits rotary motion to the shaft 28 through a 2:1 reduction gear train 36, 37 with an interposed direction reversing idle wheel 38, and a Geneva mechanism comprising star wheel sector 39 and a cam 40.
  • a bevel gear 41, 42 couples a driving shaft 43 to the shaft 30. In operation, the driving shaft 43 rotates the shaft 30, causing the gear wheels 32 and 37 to rotate in opposite directions.
  • the cams 34 and 40 are driven by the latter gear wheels and are so phased (that is, they have such angular positions relatively to each other) that they engage a tooth of their respective star wheels sectors 33 and 39 alternately, so that these sectors and with them the shafts 27 and 28 move in opposite directions through a limited angle, alternately.
  • gear trains having a 2:1 reduction ratio as mentioned each complete revolution of the shaft moves one of the shafts 27 and 28 through a small angle so that its associated movable contact steps from one fixed contact to the next in the sequence.
  • a transformer winding W has a plurality of tapping. points t t t connected to the two sets of fixed contacts of a selector switch in accordance with the invention as shown.
  • the collector bars 21 and 22 of the switch are connected to contacts of a high speed diverter switch Dv arrangedto selectively con.- nect the collector bars to a load terminal L.
  • Dv high speed diverter switch
  • the arms 24 and 25 being in the positions illustrated in FIG. 1, a change to tapping point t is.
  • the plate 20 which as shown can be circular so as to simplify the construction of its mould, can be suitably dished to provide strength.
  • The, circular form for the plate 26 is also advantageous for single-phase high voltage taps changers in that the plate can be mounted concentrically at the bottom of the porcelain insulator on the top of which the diverter switch is usually mounted.
  • the fixed contacts, which all lie in the same plane are readily accessible. and enable connections to the tappingv points to be etfected easily.
  • a selector switch comprising a support structure, a plurality of electrically isolated fixed contacts arranged on the support structure in two arcuate sets having their arcs centered on a common axis and subtending respective angles each of less than. 180 degrees on opposite. sides of said axis, first and second movable contacts cooperating respectively with said two sets of fixed contacts and.
  • a selector switch as. claimed in claim 1 including two concentric shafts respectively carrying s'aid movable contacts, a common rotatable operating member, and means drivingly coupling said concentric shafts to said common member; said means'inc'luding direction reversing gearing in respect of one of said shafts, and respective intermittent drive mechanismsfor both said shafts, said mechanisms being phased to act alternately whereby to step said shafts and therefore-the movable contacts alternately'and in opposite rotational senses.
  • a selector switch as claimed in claim 1 in electrical combination with a. tapped transformer having successive odd and even numbered tapping points, said transformer having connections. electrically connecting-its successive odd-numbered tapping points to the successive contacts in one of said sets of' fixed contacts of. the switch, and con-- References Cited by the Examiner UNITED STATES PATENTS 1,764,319 6/1930 Kurda 323-435 1,863,392 6/1932 Brand etal 200-7 1,867,147 7/1932 Haller 2004 2,231,627 2/1941 Jansen.

Landscapes

  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
US316077A 1962-10-19 1963-10-14 Opposite rotational sense actuator mechanism for tap changer contacts Expired - Lifetime US3246088A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB39699/62A GB1044520A (en) 1962-10-19 1962-10-19 Improvements relating to electric selector switches

Publications (1)

Publication Number Publication Date
US3246088A true US3246088A (en) 1966-04-12

Family

ID=10410990

Family Applications (1)

Application Number Title Priority Date Filing Date
US316077A Expired - Lifetime US3246088A (en) 1962-10-19 1963-10-14 Opposite rotational sense actuator mechanism for tap changer contacts

Country Status (8)

Country Link
US (1) US3246088A (fr)
BE (1) BE638899A (fr)
CH (1) CH427956A (fr)
DE (1) DE1266389B (fr)
DK (1) DK109396C (fr)
ES (1) ES292579A1 (fr)
GB (1) GB1044520A (fr)
NL (1) NL299490A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3484567A (en) * 1967-12-19 1969-12-16 John Johnson Switch
US3902030A (en) * 1973-08-31 1975-08-26 Laurentiv Popa Diverter switch for on-load changers
US4103119A (en) * 1976-10-12 1978-07-25 P. R. Mallory & Co. Inc. Timing mechanism having independently operated plural cam assemblies
US4595806A (en) * 1983-12-08 1986-06-17 Mitsubishi Denki Kabushiki Kaisha On-load tap changer
DE202011001444U1 (de) * 2011-01-13 2012-04-17 Maschinenfabrik Reinhausen Gmbh Handantrieb

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1764319A (en) * 1927-04-08 1930-06-17 Westinghouse Electric & Mfg Co Voltage-control system
US1863392A (en) * 1931-10-08 1932-06-14 Gen Electric Electric switch
US1867147A (en) * 1930-06-10 1932-07-12 Bbc Brown Boveri & Cie Tap changing switch and system
US2231627A (en) * 1934-04-20 1941-02-11 Jansen Bernhard Step switch device for regulating transformers
US2363886A (en) * 1942-07-15 1944-11-28 Gen Electric Electric switching mechanism
US2480589A (en) * 1946-06-07 1949-08-30 Gen Electric Electromechanical tap changing mechanism
US2560002A (en) * 1945-07-27 1951-07-10 Allis Chalmers Mfg Co Voltage regulating control and apparatus
US2785242A (en) * 1955-06-13 1957-03-12 Westinghouse Electric Corp Tap-changers
US3155782A (en) * 1959-05-01 1964-11-03 Mc Graw Edison Co Switch actuating mechanism for controlled speed tap changer

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE14682C (de) * CH. PATSCH in Wien Löthapparat
DE878392C (de) * 1944-09-17 1953-06-01 Siemens Ag Malteserkreuzgetriebe mit ungleichen Schaltschritten, insbesondere fuer Regelwerke
DE1849286U (de) * 1961-08-22 1962-04-05 Siemens Ag Drehumschalter.

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1764319A (en) * 1927-04-08 1930-06-17 Westinghouse Electric & Mfg Co Voltage-control system
US1867147A (en) * 1930-06-10 1932-07-12 Bbc Brown Boveri & Cie Tap changing switch and system
US1863392A (en) * 1931-10-08 1932-06-14 Gen Electric Electric switch
US2231627A (en) * 1934-04-20 1941-02-11 Jansen Bernhard Step switch device for regulating transformers
US2363886A (en) * 1942-07-15 1944-11-28 Gen Electric Electric switching mechanism
US2560002A (en) * 1945-07-27 1951-07-10 Allis Chalmers Mfg Co Voltage regulating control and apparatus
US2480589A (en) * 1946-06-07 1949-08-30 Gen Electric Electromechanical tap changing mechanism
US2785242A (en) * 1955-06-13 1957-03-12 Westinghouse Electric Corp Tap-changers
US3155782A (en) * 1959-05-01 1964-11-03 Mc Graw Edison Co Switch actuating mechanism for controlled speed tap changer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3484567A (en) * 1967-12-19 1969-12-16 John Johnson Switch
US3902030A (en) * 1973-08-31 1975-08-26 Laurentiv Popa Diverter switch for on-load changers
US4103119A (en) * 1976-10-12 1978-07-25 P. R. Mallory & Co. Inc. Timing mechanism having independently operated plural cam assemblies
US4595806A (en) * 1983-12-08 1986-06-17 Mitsubishi Denki Kabushiki Kaisha On-load tap changer
DE202011001444U1 (de) * 2011-01-13 2012-04-17 Maschinenfabrik Reinhausen Gmbh Handantrieb

Also Published As

Publication number Publication date
CH427956A (de) 1967-01-15
NL299490A (fr)
DK109396C (da) 1968-04-22
BE638899A (fr)
ES292579A1 (es) 1964-01-01
GB1044520A (en) 1966-10-05
DE1266389B (de) 1968-04-18

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